Indoor unit of air conditioner

The utility model discloses an indoor unit of an air conditioner, which comprises a machine body, an air inlet cover and an air outlet cover, the lifting cover can move up and down through a pluralityof lifting motion mechanisms so as to open and close the air outlet, each lifting motion mechanism comprises a moving part, and the moving parts are connected with the lifting cover so as to drive the lifting cover to move up and down; a plurality of first connecting holes are formed in one of moving parts and lifting covers of the multiple lifting motion mechanisms, a plurality of second connecting holes are formed in the other one of the moving parts and the lifting covers, the first connecting holes are opposite to the second connecting holes respectively, and the lifting covers are connected with the moving parts through the second connecting holes and the first connecting holes respectively. At least one first connecting hole and the corresponding second connecting hole are the samein size and shape, and the